__________ flux is used for the extraction of metal from its self fluxing ores.
__________ flux is used for the extraction of metal from its self fluxing ores.
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
A solution which resists change in its pH value on addition of acid/alkali is called the __________ solution.
Aluminium oxide (an abrasive) is used for grinding
Aluminium oxide (an abrasive) is used for grinding
Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.
Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.
With increase in carbon percentage in steel, its
With increase in carbon percentage in steel, its
A static fluid can not have
A static fluid can not have
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
According to maximum shear stress failure criterion, yielding in material occurs, when the maximum shear stress is equal to __________ times the yield stress.
A spark ignition petrol engine has
A spark ignition petrol engine has
Fahrenheit and Centigrade scales have the same readings at
Fahrenheit and Centigrade scales have the same readings at
Production of one ton of steel plate in a modern integrated steel plant in India consumes about __________ kWh of electricity.
Production of one ton of steel plate in a modern integrated steel plant in India consumes about __________ kWh of electricity.
A fluid is termed as the Newtonion fluid, when the shear stress is __________ the velocity gradient.
A fluid is termed as the Newtonion fluid, when the shear stress is __________ the velocity gradient.
Metals in general have a low value of thermal
Metals in general have a low value of thermal
Quartz is a __________ material.
Quartz is a __________ material.
M10 index of coke indicates its
M10 index of coke indicates its
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
Nuclear fission of one atom of uranium⁻²35 produces the energy equivalent to about __________ MeV.
Nuclear fission of one atom of uranium⁻²35 produces the energy equivalent to about __________ MeV.
Maximum permissible air velocity in pipelines is about __________ metre/second.
Maximum permissible air velocity in pipelines is about __________ metre/second.
In cold working of metal as compared to its hot working
In cold working of metal as compared to its hot working
Annealing of cast iron
Annealing of cast iron
On being hit with a hammer, __________ will readily fracture.
On being hit with a hammer, __________ will readily fracture.
The most commonly used material for sewers for carrying sewage in the normal situation is
The most commonly used material for sewers for carrying sewage in the normal situation is
On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
The term 'Value' in value engineering technique refers to the __________ cost of the product.
The term 'Value' in value engineering technique refers to the __________ cost of the product.
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
The minimum temperature to which the water can be cooled in a cooling tower is the __________ temperature of air.
Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
Carnot cycle is also termed as the constant __________ cycle in thermodynamics.
Common salt is produced from sea water in India generally by the __________ method.
Common salt is produced from sea water in India generally by the __________ method.
Which of the following is not a charge material for cupola ?
Which of the following is not a charge material for cupola ?
Percentage of differential pressure lost in a venturimeter with a tapering of 15° may be about
Percentage of differential pressure lost in a venturimeter with a tapering of 15° may be about
The main reducing agent in iron blast furnace is
The main reducing agent in iron blast furnace is
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.
Hollow shafts can be made as strong as solid shafts by making the twisting moments of both the shafts same. Shafts made by __________ have residual stresses.
Coating provided on the electrodes used in the arc welding is not expected to
Coating provided on the electrodes used in the arc welding is not expected to
Natural water contains approximately __________ percent of heavy water.
Natural water contains approximately __________ percent of heavy water.
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
Slight displacement of a floating body in liquid makes it to oscillate about its
Slight displacement of a floating body in liquid makes it to oscillate about its
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
Which of the following is the terminology used for the temperature at which the phase changes occur in a metal ?
Sulphur is melted in the sulphuric acid plant most commonly by employing
Sulphur is melted in the sulphuric acid plant most commonly by employing
Which of the following has the highest density and the lowest melting point ?
Which of the following has the highest density and the lowest melting point ?
pH value of rain water in India ranges from
pH value of rain water in India ranges from
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
__________ can not be forged.
__________ can not be forged.
Spheriodising of a material is a/an __________ process.
Spheriodising of a material is a/an __________ process.
Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to
Heat flow across a hollow sphere of inner radius 'r₁' and outer radius 'r₂' is directly proportional to
Ammonia gas can be dried by
Ammonia gas can be dried by
Sudden fall of atmospheric pressure by a large amount is an indication of the
Sudden fall of atmospheric pressure by a large amount is an indication of the
Cast iron has the unique property of high
Cast iron has the unique property of high
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
In a furnace with heating element temperature at 1700°C, the dominant machanism of heat transfer will be
Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.
Production of one ton of paper in Indian paper industry consumes about __________ kWh of electricity.
The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K⁻¹mole⁻¹)
The heat released by cooling one mole of copper from 400 K to room temperature (300 K) is (assume : Cp of copper is 23 J K⁻¹mole⁻¹)
Insulation of liquid surface can be achieved by __________ on top of its surface.
Insulation of liquid surface can be achieved by __________ on top of its surface.
The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
The pressure outside a bubble/droplet of liquid is __________ the internal pressure.
Machinability of hard alloys and tool steels is improved by
Machinability of hard alloys and tool steels is improved by
Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble of the same size & of the same fluid ?
Gage pressure within a spherical droplet of a fluid is 'p'. What will be gage pressure within a bubble of the same size & of the same fluid ?
Grain hardness is measured by the __________ hardness testing method.
Grain hardness is measured by the __________ hardness testing method.
An ideal fluid is
An ideal fluid is
Isotropic materials have the same __________ in all the directions.
Isotropic materials have the same __________ in all the directions.
Ageing of steel refers to the
Ageing of steel refers to the
Pick out the wrong statement.
Pick out the wrong statement.
Measurement of the area of the indented surface is not involved in the __________ hardhes testing method.
Measurement of the area of the indented surface is not involved in the __________ hardhes testing method.
A psychrometer does not measure the __________ temperature of moist air.
A psychrometer does not measure the __________ temperature of moist air.
Larger length & diameter water pipes are made by
Larger length & diameter water pipes are made by
The dimensions of Planck's constant is the same as that of the
The dimensions of Planck's constant is the same as that of the
The product of a commercial direct reduction process is
The product of a commercial direct reduction process is
Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
Vibration upto 100 kilo hertz can be most accurately measured by a __________ type accelerometer.
The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.
The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.
Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?
Which of the following low melting alloy containing bismuth and lead is used for electric fuse ?
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.
The kinematic viscosity (in stoke) and the absolute/dynamic viscosity (in poise) are the same for __________ at room temperature.
Work study deals with the __________ study.
Work study deals with the __________ study.
When metals are heated to high temperature, their __________ increases in general.
When metals are heated to high temperature, their __________ increases in general.
In case of simple harmonic motion, displacement is proportional to the
In case of simple harmonic motion, displacement is proportional to the
While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ x Tm (where, Tm Melting temperature).
While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ x Tm (where, Tm Melting temperature).
Cast iron has the unique property of high
Cast iron has the unique property of high
A hot short metal is
A hot short metal is
For infinite parallel planes having emis-sivities ε₁ & ε₂, the interchange factor for radiation from surface 1 to surface 2 is given by
For infinite parallel planes having emis-sivities ε₁ & ε₂, the interchange factor for radiation from surface 1 to surface 2 is given by
The machanism involved in the removal of metal in drilling operation is by
The machanism involved in the removal of metal in drilling operation is by
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
Minimum temperature upto which water can be theoretically cooled down in the cooling tower by evaporative cooling is equal to the __________ temperature of air.
The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
The capital & running costs of similar machines having unequal service life can be compared by the __________ method.
The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.
The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the __________ point of the material.
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of
Wave length of X-rays is about 1 angstron, however it can not pass through a sheet of
The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer.
The power of a low capacity prime mover is most suitably measured by a __________ type dynamometer.
What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K ? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.
What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K ? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.
In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
Good design of the casing of a centrifugal pump aims at minimising the
Good design of the casing of a centrifugal pump aims at minimising the
Tumbling is the process of improving the __________ of the materials/parts.
Tumbling is the process of improving the __________ of the materials/parts.
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).
1% concentration of water vapor in air is equivalent to __________ ppm (parts per million).
Main constituent of bone ash is
Main constituent of bone ash is
The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
The highest stress that a material can withstand for a specified length of time without excessive deformation is called the __________ strength.
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
The wet bulb temperature is lower in dry air than in wet air at the same temperature. A dry bulb thermometer registers a higher temperature than a wet bulb thermometer except at __________ percent relative humidity.
Carburettor in a spark ignition engine is used to
Carburettor in a spark ignition engine is used to
Out of the following, the joint produced by __________ has the lowest strength.
Out of the following, the joint produced by __________ has the lowest strength.
__________ joint is mostly used for joining pipes carrying water at low pressure.
__________ joint is mostly used for joining pipes carrying water at low pressure.
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
Corrosion rate can not be lowered by reducing the __________ of the corroding medium.
Corrosion rate can not be lowered by reducing the __________ of the corroding medium.
A good abrasive
A good abrasive
The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
Deformation band is absent in materials having __________ lattice crystal structure.
Deformation band is absent in materials having __________ lattice crystal structure.
To counteract the bad effects of strain hardening on a cold formed part, it must be
To counteract the bad effects of strain hardening on a cold formed part, it must be
The path and movements followed by men, materials & equipments in executing the activities is indicated by the
The path and movements followed by men, materials & equipments in executing the activities is indicated by the
An alloy of Fe - 0.4 % C is
An alloy of Fe - 0.4 % C is
The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is
The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is
